Session The Not So Boring Life of Model Classes mmalcolm Crawford, Apple Computer, Inc. Track: Programming & Scripting Date: Wednesday, October 27 Time: 11:35am - 12:20pm Location: Stevens Creek TrackBack Model classes, the unseen workhorses of every Cocoa application, have always had a number of conventions to adhere to such as key-value coding (KVC) for the naming of instance variables and the format of accessor methods. With the advent of Cocoa bindings and key-value observing (KVO), there are even more conventions to follow. But with these conventions come an amazing amount of power and flexibility. And looking to the future, these conventions appear set to become more important still. This presentation first enumerates the basic accessor method patterns, and illustrates when each should be used. It then reviews key-value coding, and in particular the implementation and use of validation methods. Finally it discusses key-value observing, and highlights the use of KVO in an application architecture to support undo. Along the way, you'll learn about techniques to prepare your applications for the future.

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